Smoke and even more smoke
As a treat after a days Air Cadeting with the gliders at Kenley it was considered good sport to hot foot down to Gatwick just to watch an Ambassador starting up. In those days one could park under the 'fingers' and find a door open that took you up to a window opposite the parking bays. There was usually a Dan Air machine ready to fire up and the resultant smoke display well worth the trip. There was also the added bonus of the sound of the 'Cents' warming up. Was there ever a scheme to put t/props in them rather than go 748/Herald !!